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Real-color electroluminescence images collected after (a) 210, (b) 260, (c) 360, and (d) 520 s of current injection at 12 A/cm2. Images were collected under 0.1 A/cm2 injection for 5 s exposures.
Real-color electroluminescence images collected (a) prior to, (b) following 1980 s of current injection at 12 A/cm2 and (c) following 10 h of annealing at 700 °C in nitrogen atmosphere. The arrows in (c) denote the locations of the residual "scars" observed following the anneal that coincide with the positions of the green partial dislocations following the current injection. (d) Gray-scale image of the green channel from (c). Inset: gray-scale intensity of the line-scans shown in (d).
Gray-scale intensity along lines in Fig. 2(d) . Peaks denote the residual green emission from the propagated green emitting point defects following annealing-induced contraction of the RISFs.
(a) RC EL and (b)–(d) hyperspectral EL images collected from the same diode following three successive cycles of current injection at 12 A/cm2 for ∼2000 s and subsequent 700 °C, 10 h anneals, followed by a final current injection cycle. The images were collected at 1 A/cm2 for 5 and 30 s for the real-color and hyperspectral EL images, respectively. The hyper spectral images were collected with the 2 nm pass-band centered at (b) 424, (c) 534, and (d) 720 nm, which correspond to the peak emission of RISFs, the green PDs as observed here and the red PD emission. (e) EL spectra extracted from the series of hyper spectral images of this spatial region.
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